package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    DishMapper dishMapper;
    @Autowired
    DishFlavorMapper dishFlavorMapper;
    @Autowired
    SetmealDishMapper setmealDishMapper;
    @Autowired
    SetmealMapper setmealMapper;
    /*新增菜品*/
    @Override
    @Transactional
    public void save(DishDTO dishDTO) {
        Dish dish = new Dish();
        // 向菜品表插入一条数据
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);

        Long id = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0)
        {
            flavors.forEach(Flavor -> {
                Flavor.setDishId(id);
            });
            // 向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);

        }

    }

    /*
    * 根据id查询菜品和口味*/
    @Override
    public DishVO selectById(Long id) {
        //设置Dishvo对象接受
        DishVO dishVO = new DishVO();
        // 根据id查询口味
        List<DishFlavor> dishFlavors =dishFlavorMapper.selectFlavorsByDishId(id);
        // 根据id查询菜品
        Dish dish  = dishMapper.selectById(id);

        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /*菜品的分页查询*/
    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {

        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());

        Page<DishVO> page = dishMapper.page(dishPageQueryDTO);

        Long total = page.getTotal();
        List list = page.getResult();

        return new PageResult(total,list);
    }

    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        // 判断菜品是否能够删除  -- 是否是起售商品

        for(Long id : ids){
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE)
            {
                // 当前菜品处于起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        // 判断是否被套餐关联

        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0){
            // 当前菜品被套餐关联，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        // 删除菜品数据

        // 根据主键删id
        for(Long id : ids){
         dishMapper.deleteById(id);
            // 删除菜品的口味数据
         dishFlavorMapper.deleteByDishId(id);
        }
    }

    @Transactional
    /*
    * 根据ID修改信息*/
    @Override
    public void update(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils
                .copyProperties(dishDTO,dish);
        // 修改基本信息
        dishMapper.update(dish);

        // 删除原有的口味
        dishFlavorMapper.deleteByDishId(dish.getId());

        // 重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0)
        {
            flavors.forEach(Flavor -> {
                Flavor.setDishId(dish.getId());
            });
            // 向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);

        }
    }


    // 根据分类ID查询菜品
    @Override
    public List<Dish> selectBycategotyId(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.selectByCategoryId(dish);
    }

    // 菜品的起售和停售
    @Override
    public void updateStatus(Integer status, Long id) {
        Dish dish = dishMapper.selectById(id);
        dish.setStatus(status);
        dishMapper.update(dish);
    }

    /*
    * 条件查询菜品和口味*/
    @Override
    public List<DishVO> selectDishBycategotyId(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);
        List<DishVO> dishVOList = new ArrayList<>();

        for(Dish d : dishList){
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d, dishVO);

           // 根据菜品id查询口味
            List<DishFlavor> flavors = dishFlavorMapper.selectFlavorsByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }


        return dishVOList;
    }

}
